Document and Entity Information - shares	9 Months Ended
	Nov. 02, 2019	Dec. 06, 2019
Document Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Nov. 02, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	BKE
Title of 12(b) Security	Common Stock, $0.01 par value
Entity Registrant Name	BUCKLE INC
Entity Central Index Key	0000885245
Current Fiscal Year End Date	--02-01
Entity Filer Category	Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		49,224,561